CN105142254B - The detection means of magnetron working condition, method and micro-wave oven in micro-wave oven - Google Patents
The detection means of magnetron working condition, method and micro-wave oven in micro-wave oven Download PDFInfo
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- CN105142254B CN105142254B CN201510428910.4A CN201510428910A CN105142254B CN 105142254 B CN105142254 B CN 105142254B CN 201510428910 A CN201510428910 A CN 201510428910A CN 105142254 B CN105142254 B CN 105142254B
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
- H05B6/66—Circuits
- H05B6/68—Circuits for monitoring or control
- H05B6/681—Circuits comprising an inverter, a boost transformer and a magnetron
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Abstract
The invention discloses detection means, method and the micro-wave oven of magnetron working condition in a kind of micro-wave oven, wherein, detection means includes：Anode of magnetron current detection module, for detecting the anode current of magnetron and generating anode current currency；Control module, for obtaining the working condition of magnetron according to anode current currency and the anode current standard value to prestore.The detection means can obtain the working condition of magnetron in micro-wave oven in real time and exactly, and to judge whether magnetron occurs exception, and it realizes that simply cost is relatively low.
Description
Technical field
The present invention relates to household electrical appliance technical field, the detection dress of magnetron working condition in more particularly to a kind of micro-wave oven
Put, method and micro-wave oven.
Background technology
The culinary art effect that micro-wave oven protrudes by it, is accepted extensively by user already.But the magnetron in micro-wave oven is because of it
Self structure, the influence limited etc. with the match condition of cavity and radiating, easily occur that temperature is too high or structural failure etc. is abnormal
Situation.
At present, current detection circuit is added in the control circuit of part micro-wave oven, for detecting the work of magnetron
State.But due to other component failures in control circuit also be present, it is thus impossible to the work of enough accurate detection magnetrons
Make state, but also the shortcomings of high cost, wiring complexity be present.
The content of the invention
It is contemplated that at least solves one of technical problem in correlation technique to a certain extent.Therefore, the present invention
One purpose can accurately detect magnetic in micro-wave oven in a kind of detection means of the magnetron working condition in micro-wave oven is proposed
The working condition of keyholed back plate, and realize that simply cost is relatively low.
Detection method of the second object of the present invention in the magnetron working condition in a kind of micro-wave oven is proposed.
Third object of the present invention is to propose a kind of micro-wave oven.
According to a first aspect of the present invention in the micro-wave oven of embodiment magnetron working condition detection means, including：Magnetic control
Tube anode current detection module, for detecting the anode current of magnetron and generating anode current currency；Control module, it is used for
The working condition of the magnetron is obtained according to the anode current currency and the anode current standard value to prestore.
The detection means of magnetron working condition in micro-wave oven according to embodiments of the present invention, by the sun for detecting magnetron
Electrode current, and according to the anode current of magnetron and the working condition of the anode current standard value acquisition magnetron to prestore, so that
The unusual conditions such as magnetron temperature is too high or is damaged can be judged in real time and exactly, so as to take necessity in time
Safeguard measure, and realize simple and convenient, cost is relatively low.
In addition, in micro-wave oven according to the above embodiment of the present invention magnetron working condition detection means, can also have
Additional technical characteristic as follows：
In one embodiment of the invention, if the anode current currency is more than the anode current standard value
Twice, then judge that the magnetron is in temperature of anode and crosses high state；If the anode current currency is less than the anode
The half of current standard value, then judge that the magnetron is in magnetic core state of rupture.
Further, judging that the magnetron is in after temperature of anode crosses high state, also controlling the magnetron to stop
Only work or reduce the power output of the magnetron；After judging that the magnetron is in magnetic core state of rupture, also control
The magnetron is stopped.
In one embodiment of the invention, the anode of magnetron current detection module specifically includes：First resistor, institute
The one end for stating first resistor is connected with the anode of the magnetron；Second resistance, one end of the second resistance and described first
The other end of resistance is connected, the other end ground connection of the second resistance, wherein, have between the first resistor and second resistance
First node；3rd resistor, one end of the 3rd resistor are connected with the first node, and the other end of the 3rd resistor is
The output end of the anode of magnetron current detection module.
In one embodiment of the invention, the detection means of magnetron working condition also includes in described micro-wave oven：
Host computer, the host computer are connected with the anode of magnetron current detection module, and the host computer is by order wire by described in
The anode current of magnetron is sent to the control module.
In one embodiment of the invention, the detection means of magnetron working condition also includes in described micro-wave oven：
The optocoupler being connected between the anode of magnetron current detection module and the control module, the anode of magnetron electric current inspection
Module is surveyed to send the anode current of the magnetron to the control module by the optocoupler.
According to a second aspect of the present invention in the micro-wave oven of embodiment magnetron working condition detection method, its feature exists
In comprising the following steps：Detect the anode current of magnetron and generate anode current currency；It is current according to the anode current
It is worth and the anode current standard value that prestores obtains the working condition of the magnetron.
The detection method of magnetron working condition in micro-wave oven according to embodiments of the present invention, by the sun for detecting magnetron
Electrode current, and according to the anode current of magnetron and the working condition of the anode current standard value acquisition magnetron to prestore, so that
The unusual conditions such as magnetron temperature is too high or is damaged can be judged in real time and exactly, so as to take necessity in time
Safeguard measure, meanwhile, its implementation is simple and convenient, and cost is relatively low.
In addition, in micro-wave oven according to the above embodiment of the present invention magnetron working condition detection method, can also have
Additional technical characteristic as follows：
In one embodiment of the invention, if the anode current currency is more than the anode current standard value
Twice, then judge that the magnetron is in temperature of anode and crosses high state；If the anode current currency is less than the anode
The half of current standard value, then judge that the magnetron is in magnetic core state of rupture.
Further, judging that the magnetron is in after temperature of anode crosses high state, also controlling the magnetron to stop
Only work or reduce the power output of the magnetron；After judging that the magnetron is in magnetic core state of rupture, also control
The magnetron is stopped.
In one embodiment of the invention, the anode current of the magnetron is fed back by host computer.
In one embodiment of the invention, the anode current of magnetron described in opto-coupled feedback is passed through.
The micro-wave oven of embodiment according to a third aspect of the present invention, there is magnetic in the micro-wave oven of first aspect present invention embodiment
The detection means of keyholed back plate working condition.
Micro-wave oven according to embodiments of the present invention, by detecting the anode current of magnetron, and according to the anode of magnetron
Electric current and the anode current standard value to prestore obtain the working condition of magnetron, so as to judge in real time and exactly magnetic control
Pipe temperature is too high or the unusual condition such as be damaged, so as to take necessary safeguard measure in time, such as controls micro-wave oven to stop
Only work, and have the advantages that to realize that simple, cost is relatively low.
Brief description of the drawings
Fig. 1 is the structural frames of the detection means of magnetron working condition in the micro-wave oven according to one embodiment of the invention
Figure；
Fig. 2 is the circuit diagram according to the anode of magnetron current detecting of one embodiment of the invention；
Fig. 3 is the circuit diagram according to the anode of magnetron current detecting of another embodiment of the present invention；
Fig. 4 is the structural frames of the detection means of magnetron working condition in the micro-wave oven according to another embodiment of the present invention
Figure；
Fig. 5 is the flow chart of the detection method of magnetron working condition in the micro-wave oven according to one embodiment of the invention.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
Fig. 1 is the structural frames of the detection means of magnetron working condition in the micro-wave oven according to one embodiment of the invention
Figure.
As shown in figure 1, in the micro-wave oven of the embodiment of the present invention magnetron working condition detection means, including：Magnetron
Anode current detection module 10 and control module 20.
Wherein, anode of magnetron current detection module 10 is used to detect the anode current of magnetron and generate anode current to work as
Preceding value.
According to one embodiment of present invention, as shown in Fig. 2 anode of magnetron current detection module 10 specifically includes：The
One resistance R1, second resistance R2 and 3rd resistor R3.Wherein, first resistor R1 one end is connected with magnetron MGT anode, the
Two resistance R2 one end is connected with the first resistor R1 other end, second resistance R2 other end ground connection GND, wherein, the first electricity
There is first node J1 between resistance R1 and second resistance R3,3rd resistor R3 one end is connected with first node J1,3rd resistor
The R3 other end is the output end of anode of magnetron current detection module 10.The circuit can be used in frequency-conversion microwave oven.
As shown in Figure 2, a transformer T secondary windings is connected to voltage-multiplying circuit, the high pressure after multiplication of voltage, one end connection
To magnetron MGT anode, the other end is connected with second resistance R2 one end, and magnetron is connected to after second resistance R2
MGT.When supply magnetron MGT anode voltage (- 4000V) through certain voltage drop can be formed during second resistance R2, the voltage
The size of drop is proportional to the size of current for flowing through anode of magnetron, and carrying out sampling to the voltage drop by 3rd resistor R3 can obtain
Obtain magnetron MGT anode current IB.
According to another embodiment of the invention, as shown in figure 3, anode of magnetron current detection module 10 specifically includes：
4th resistance R4 and the 5th resistance R5, wherein, the 4th resistance R4 one end passes through the 3rd diode D3 and magnetron MGT anode
It is connected, also, the 4th resistance R4 one end is connected with the 3rd diode D3 negative electrode, the 4th resistance R4 other end ground connection GND,
One end with the 4th resistance R4, the 3rd diode D3 negative electrode are connected respectively for 5th resistance R5 one end, and the 5th resistance R5's is another
One end is the output end of anode of magnetron current detection module 10.The circuit can be used for determining in frequency micro-wave oven, when supply magnetron
For MGT anode voltage (- 4000V) through that can form certain voltage drop during the 4th resistance R4, the size of the voltage drop is proportional to stream
The size of current of anode of magnetron is crossed, samples the sun that can obtain magnetron MGT to the voltage drop by the 5th resistance R5
Electrode current IB.
Control module 20 is used for the work that magnetron is obtained according to anode current currency and the anode current standard value to prestore
Make state.
It should be appreciated that during the design and producing of micro-wave oven, anode need to be obtained by theory analysis and actual experiment
The specified anode current value of the standard value of electric current, i.e. magnetron, and the control module 20 such as MCU of micro-wave oven can be pre-stored in
In (Micro Control Unit, micro-control unit).
After anode of magnetron current detection module 10 detects the anode current of magnetron, the anode current can be sent
To control module 20.As shown in figure 4, in one embodiment of the invention, the detection dress of magnetron working condition in micro-wave oven
Put the host computer 30 that may also include and be connected with anode of magnetron current detection module 10, host computer 30 can be by order wire by magnetic control
The anode current of pipe is sent to control module 20.
Specifically, will after anode of magnetron current detection module 10 detects the anode current currency of magnetron
Anode current currency is sent to host computer 30, and host computer 30 is sent anode current currency to control module by order wire
20, anode current currency is judged by control module 20, to obtain the current operating state of magnetron, and according to magnetic control
The current operating state of pipe is controlled to magnetron.
It is understood that the anode current that the transmission of anode of magnetron current detection module 10 is received in host computer 30 is worked as
After preceding value, host computer 30 first can be judged anode current currency, to obtain the current operating state of magnetron, and
When needing the magnetron to be stopped, by controlling control module 20 or relay K1 so that magnetron is stopped.
In another embodiment of the present invention, the anode current of magnetron can be sent to control module by optocoupler
20, wherein optocoupler is connected between anode of magnetron current detection module 10 and control module 20.That is, in magnetron sun
After electrode current detection module 10 detects anode current currency, sent by optocoupler logical to control module 20, control module 20
Cross and anode current currency is judged, to obtain the current operating state of magnetron, and according to the work at present of magnetron
State is controlled to magnetron.
Certainly, also anode current can be sent to control module 20 by other means, it is numerous to list herein.
After control module 20 receives anode current currency, control module 20 can enter itself and anode current standard value
Row compares.If anode current currency is more than twice of anode current standard value, judge that magnetron is in temperature of anode mistake
High state；If anode current currency is less than the half of anode current standard value, judge that magnetron is in magnetic core rupture shape
State, and can be in judging magnetron after temperature of anode crosses high state, control magnetron is stopped or reduced magnetron
Power output；And after judging that magnetron is in magnetic core state of rupture, directly control magnetron to be stopped.Alternatively, exist
, can also be by showing that error code will determine that result when judging that magnetron is in temperature of anode and crosses high state or magnetic core state of rupture
Feed back to user.
It is understood that in frequency-conversion microwave oven, variable-frequency power sources or frequency converter can be adjusted by control module 20
Dutycycle reduces the power output of magnetron；In frequency micro-wave oven is determined, the logical of the regulating relay of control module 20 can be passed through
It is disconnected to compare to reduce the power output of magnetron.
The detection means of magnetron working condition in micro-wave oven according to embodiments of the present invention, by the sun for detecting magnetron
Electrode current, and according to the anode current of magnetron and the working condition of the anode current standard value acquisition magnetron to prestore, so that
The unusual conditions such as magnetron temperature is too high or is damaged can be judged in real time and exactly, so as to take necessity in time
Safeguard measure, such as control micro-wave oven to be stopped, and show error code to remind user's maintenance etc., and realize simple side
Just, cost is relatively low.
The detection means of magnetron working condition, the present invention also propose a kind of microwave in the micro-wave oven of corresponding above-described embodiment
The detection method of magnetron working condition in stove.
Fig. 5 is the flow chart of the detection method of magnetron working condition in the micro-wave oven according to one embodiment of the invention.
As shown in figure 5, in the micro-wave oven of the embodiment of the present invention magnetron working condition detection method, including following step
Suddenly：
S501, detect the anode current of magnetron and generate anode current currency.
According to one embodiment of present invention, the anode current of the electric circuit inspection magnetron shown in Fig. 2 can be passed through.Wherein,
First resistor R1 one end is connected with magnetron MGT anode, second resistance R2 one end and first resistor R1 other end phase
Even, second resistance R2 other end ground connection GND, wherein, there is first node J1 between first resistor R1 and second resistance R3, the
Three resistance R3 one end is connected with first node J1, and the 3rd resistor R3 other end is the defeated of anode of magnetron current detection module
Go out end.The circuit can be used in frequency-conversion microwave oven.
As shown in Figure 2, a transformer T secondary windings is connected to voltage-multiplying circuit, the high pressure after multiplication of voltage, one end connection
To magnetron MGT anode, the other end is connected with second resistance R2 one end, and magnetron is connected to after second resistance R2
MGT.Certain voltage drop can be formed when supplying magnetron MGT anode voltage (- 4000V) after second resistance R2, the electricity
The size of pressure drop is proportional to the size of current for flowing through anode of magnetron, and the voltage drop is sampled by 3rd resistor R3
Obtain magnetron MGT anode current IB.
According to another embodiment of the invention, the anode current of the electric circuit inspection magnetron shown in Fig. 3 can be passed through.Its
In, the 4th resistance R4 one end is connected by the 3rd diode D3 with magnetron MGT anode, also, the one of the 4th resistance R4
End is connected with the 3rd diode D3 negative electrode, and the 4th resistance R4 other end is grounded GND, and the 5th resistance R5 one end is respectively with the
Four resistance R4 one end, the 3rd diode D3 negative electrode are connected, and the 5th resistance R5 other end is anode of magnetron current detecting
The output end of module.The circuit can be used for determining in frequency micro-wave oven, when supply magnetron MGT anode voltage (- 4000V) is through the 4th
Certain voltage drop can be formed during resistance R4, the size of the voltage drop is proportional to the size of current for flowing through anode of magnetron, passed through
5th resistance R5 samples the anode current IB that can obtain magnetron MGT to the voltage drop.
S502, the working condition of magnetron is obtained according to anode current currency and the anode current standard value to prestore.
It should be appreciated that during the design and producing of micro-wave oven, anode need to be obtained by theory analysis and actual experiment
The specified anode current value of the standard value of electric current, i.e. magnetron, and can be pre-stored in the MCU of micro-wave oven.
After the anode current of magnetron is detected, the anode current can be sent to MCU.In the implementation of the present invention
In example, the anode current of magnetron can be fed back by host computer, for example, being provided with host computer in micro-wave oven, host computer passes through
Order wire sends the anode current of magnetron.
Specifically, after the anode current currency of magnetron is detected, anode current currency is sent to upper
Machine, host computer is sent anode current currency to control module by order wire, by control module to anode current currency
Judged, to obtain the current operating state of magnetron, and magnetron is controlled according to the current operating state of magnetron
System.
It is understood that receive the anode current currency of anode of magnetron current detection module transmission in host computer
Afterwards, host computer first can be judged anode current currency, to obtain the current operating state of magnetron, and needing magnetic
When keyholed back plate is stopped, by controlling control module or relay so that magnetron is stopped.
In another embodiment of the present invention, the anode current of opto-coupled feedback magnetron can be passed through.That is, examining
After measuring anode current currency, sent by optocoupler to control module, control module to anode current currency by carrying out
Judge, to obtain the current operating state of magnetron, and magnetron is controlled according to the current operating state of magnetron.
Certainly, anode current can be also fed back by other means, it is numerous to list herein.
, can be by it compared with anode current standard value after anode current currency is received.If anode current
Currency is more than twice of anode current standard value, then judges that magnetron is in temperature of anode and crosses high state；If anode current
Currency is less than the half of anode current standard value, then judges that magnetron is in magnetic core state of rupture, and can judge magnetron
After temperature of anode crosses high state, control magnetron is stopped or reduced the power output of magnetron；And judging magnetic
Keyholed back plate is in after magnetic core state of rupture, directly controls magnetron to be stopped.Alternatively, judging that magnetron is in anode temperature
When spending high state or magnetic core state of rupture, also it can will determine that result feeds back to user by showing error code.
It is understood that in frequency-conversion microwave oven, can be dropped by adjusting the dutycycle of variable-frequency power sources or frequency converter
The power output of low magnetron；In frequency micro-wave oven is determined, the defeated of magnetron can be reduced by the make-to-break ratio of regulating relay
Go out power.
The detection method of magnetron working condition in micro-wave oven according to embodiments of the present invention, by the sun for detecting magnetron
Electrode current, and according to the anode current of magnetron and the working condition of the anode current standard value acquisition magnetron to prestore, so that
The unusual conditions such as magnetron temperature is too high or is damaged can be judged in real time and exactly, so as to take necessity in time
Safeguard measure, such as control micro-wave oven to be stopped, and show error code to remind user's maintenance etc., and realize simple side
Just, cost is relatively low.
To realize the detection means and method of magnetron working condition in the micro-wave oven of above-described embodiment, the present invention also proposes
A kind of micro-wave oven.Wherein, the micro-wave oven of the embodiment of the present invention, in the micro-wave oven comprising any one embodiment in above-described embodiment
The detection means of magnetron working condition, its embodiment can refer to above-described embodiment, will not be repeated here.
Micro-wave oven according to embodiments of the present invention, by detecting the anode current of magnetron, and according to the anode of magnetron
Electric current and the anode current standard value to prestore obtain the working condition of magnetron, so as to judge magnetron temperature in time
It is too high or be damaged etc. abnormal, and it can in time be stopped with automatic protection or remind user's maintenance, meanwhile, its implementation
Simple and convenient, cost is relatively low.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.Moreover, specific features, structure, material or the feature of description can be with office
Combined in an appropriate manner in one or more embodiments or example.In addition, in the case of not conflicting, the skill of this area
Art personnel can be tied the different embodiments or example and the feature of different embodiments or example described in this specification
Close and combine.
In addition, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the invention, " multiple " are meant that at least two, such as two, three
It is individual etc., unless otherwise specifically defined.
Any process or method described otherwise above description in flow chart or herein is construed as, and represents to include
Module, fragment or the portion of the code of the executable instruction of one or more the step of being used to realize specific logical function or process
Point, and the scope of the preferred embodiment of the present invention includes other realization, wherein can not press shown or discuss suitable
Sequence, including according to involved function by it is basic simultaneously in the way of or in the opposite order, carry out perform function, this should be of the invention
Embodiment person of ordinary skill in the field understood.
Expression or logic and/or step described otherwise above herein in flow charts, for example, being considered use
In the order list for the executable instruction for realizing logic function, may be embodied in any computer-readable medium, for
Instruction execution system, device or equipment (such as computer based system including the system of processor or other can be held from instruction
The system of row system, device or equipment instruction fetch and execute instruction) use, or combine these instruction execution systems, device or set
It is standby and use.For the purpose of this specification, " computer-readable medium " can any can be included, store, communicate, propagate or pass
Defeated program is for instruction execution system, device or equipment or the dress used with reference to these instruction execution systems, device or equipment
Put.The more specifically example (non-exhaustive list) of computer-readable medium includes following：Electricity with one or more wiring
Connecting portion (electronic installation), portable computer diskette box (magnetic device), random access memory (RAM), read-only storage
(ROM), erasable edit read-only storage (EPROM or flash memory), fiber device, and portable optic disk is read-only deposits
Reservoir (CDROM).In addition, computer-readable medium, which can even is that, to print the paper of described program thereon or other are suitable
Medium, because can then enter edlin, interpretation or if necessary with it for example by carrying out optical scanner to paper or other media
His suitable method is handled electronically to obtain described program, is then stored in computer storage.
It should be appreciated that each several part of the present invention can be realized with hardware, software, firmware or combinations thereof.Above-mentioned
In embodiment, software that multiple steps or method can be performed in memory and by suitable instruction execution system with storage
Or firmware is realized.If, and in another embodiment, can be with well known in the art for example, realized with hardware
Any one of row technology or their combination are realized：With the logic gates for realizing logic function to data-signal
Discrete logic, have suitable combinational logic gate circuit application specific integrated circuit, programmable gate array (PGA), scene
Programmable gate array (FPGA) etc..
Those skilled in the art are appreciated that to realize all or part of step that above-described embodiment method carries
Suddenly it is that by program the hardware of correlation can be instructed to complete, described program can be stored in a kind of computer-readable storage medium
In matter, the program upon execution, including one or a combination set of the step of embodiment of the method.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing module, can also
That unit is individually physically present, can also two or more units be integrated in a module.Above-mentioned integrated mould
Block can both be realized in the form of hardware, can also be realized in the form of software function module.The integrated module is such as
Fruit is realized in the form of software function module and as independent production marketing or in use, can also be stored in a computer
In read/write memory medium.
Storage medium mentioned above can be read-only storage, disk or CD etc..Although have been shown and retouch above
Embodiments of the invention are stated, it is to be understood that above-described embodiment is exemplary, it is impossible to be interpreted as the limit to the present invention
System, one of ordinary skill in the art can be changed to above-described embodiment, change, replace and become within the scope of the invention
Type.
Claims (9)
- A kind of 1. detection means of magnetron working condition in micro-wave oven, it is characterised in that including：Anode of magnetron current detection module, for detecting the anode current of magnetron and generating anode current currency；Control module, for obtaining the magnetron according to the anode current currency and the anode current standard value to prestore Working condition, wherein,If the anode current currency is more than twice of the anode current standard value, judge that the magnetron is in sun Pole temperature crosses high state；If the anode current currency is less than the half of the anode current standard value, judge that the magnetron is in magnetic Core state of rupture,Wherein, the anode of magnetron current detection module specifically includes：First resistor, one end of the first resistor are connected with the anode of the magnetron；Second resistance, one end of the second resistance are connected with the other end of the first resistor, the second resistance it is another End ground connection, wherein, there is first node between the first resistor and second resistance；3rd resistor, one end of the 3rd resistor are connected with the first node, and the other end of the 3rd resistor is described The output end of anode of magnetron current detection module, a transformer T secondary windings is connected to voltage-multiplying circuit, after multiplication of voltage High pressure, one end are connected to the anode of magnetron, and the other end is connected with one end of second resistance, and magnetic is connected to after second resistance Keyholed back plate, when supply magnetron MGT anode voltage is proportional to stream through forming voltage drop, the size of the voltage drop during second resistance The size of current of anode of magnetron is crossed, the voltage drop is sampled by 3rd resistor to obtain the anode of the magnetron Electric current.
- 2. the detection means of magnetron working condition in micro-wave oven as claimed in claim 1, it is characterised in thatJudging that the magnetron is in after temperature of anode crosses high state, also controlling the magnetron to be stopped or reduce institute State the power output of magnetron；After judging that the magnetron is in magnetic core state of rupture, the magnetron is also controlled to be stopped.
- 3. the detection means of magnetron working condition in micro-wave oven as claimed in claim 1, it is characterised in that also include：Host computer, the host computer are connected with the anode of magnetron current detection module, and the host computer will by order wire The anode current of the magnetron is sent to the control module.
- 4. the detection means of magnetron working condition in micro-wave oven as claimed in claim 1, it is characterised in that also include：The optocoupler being connected between the anode of magnetron current detection module and the control module, the anode of magnetron electricity Stream detection module is sent the anode current of the magnetron to the control module by the optocoupler.
- 5. a kind of micro-wave oven, it is characterised in that including magnetron work shape in the micro-wave oven as described in claim any one of 1-4 The detection means of state.
- A kind of 6. detection method of magnetron working condition in micro-wave oven, it is characterised in that including：The anode current of magnetron is detected by anode of magnetron current detection module and generates anode current currency；The working condition of the magnetron is obtained according to the anode current currency and the anode current standard value to prestore, its In,If the anode current currency is more than twice of the anode current standard value, judge that the magnetron is in sun Pole temperature crosses high state；If the anode current currency is less than the half of the anode current standard value, judge that the magnetron is in magnetic Core state of rupture, wherein, the anode of magnetron current detection module specifically includes：First resistor, one end of the first resistor are connected with the anode of the magnetron；Second resistance, one end of the second resistance are connected with the other end of the first resistor, the second resistance it is another End ground connection, wherein, there is first node between the first resistor and second resistance；3rd resistor, one end of the 3rd resistor are connected with the first node, and the other end of the 3rd resistor is described The output end of anode of magnetron current detection module, a transformer T secondary windings is connected to voltage-multiplying circuit, after multiplication of voltage High pressure, one end are connected to the anode of magnetron, and the other end is connected with one end of second resistance, and magnetic is connected to after second resistance Keyholed back plate, when supply magnetron MGT anode voltage is proportional to stream through forming voltage drop, the size of the voltage drop during second resistance The size of current of anode of magnetron is crossed, the voltage drop is sampled by 3rd resistor to obtain the anode of the magnetron Electric current.
- 7. the detection method of magnetron working condition in micro-wave oven as claimed in claim 6, it is characterised in thatJudging that the magnetron is in after temperature of anode crosses high state, also controlling the magnetron to be stopped or reduce institute State the power output of magnetron；After judging that the magnetron is in magnetic core state of rupture, the magnetron is also controlled to be stopped.
- 8. the detection method of magnetron working condition in micro-wave oven as claimed in claim 6, it is characterised in that pass through host computer Feed back the anode current of the magnetron.
- 9. the detection method of magnetron working condition in micro-wave oven as claimed in claim 6, it is characterised in that anti-by optocoupler Present the anode current of the magnetron.
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| CN201510428910.4A CN105142254B (en) | 2015-07-20 | 2015-07-20 | The detection means of magnetron working condition, method and micro-wave oven in micro-wave oven |
| PCT/CN2016/073925 WO2017012338A1 (en) | 2015-07-20 | 2016-02-17 | Microwave oven, and starting control device and method for variable-frequency power supply of microwave oven |
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| WO2017012338A1 (en) * | 2015-07-20 | 2017-01-26 | 广东美的厨房电器制造有限公司 | Microwave oven, and starting control device and method for variable-frequency power supply of microwave oven |
| CN107191980A (en) * | 2017-06-20 | 2017-09-22 | 广东美的厨房电器制造有限公司 | The determination methods and frequency-conversion microwave oven of frequency-conversion microwave oven state of ground wire |
| CN107592694B (en) * | 2017-08-16 | 2020-06-16 | 深圳麦格米特电气股份有限公司 | Magnetron temperature adjusting method, device and system, variable frequency power supply and microwave equipment |
| CN107632247B (en) * | 2017-08-31 | 2020-07-28 | 广东美的厨房电器制造有限公司 | Method, device and equipment for detecting state of magnetron |
| CN107770891B (en) * | 2017-10-25 | 2019-06-18 | 广东美的厨房电器制造有限公司 | Magnetron heater control circuit, magnetron power supply circuit |
| CN107896393B (en) * | 2017-10-30 | 2020-01-03 | 深圳麦格米特电气股份有限公司 | Magnetron temperature adjusting method, device and system, variable frequency power supply and microwave equipment |
| CN110456190B (en) * | 2019-07-24 | 2020-09-15 | 深圳麦格米特电气股份有限公司 | Magnetron state detection method, controller, circuit and system |
| CN110530553B (en) * | 2019-08-07 | 2020-11-06 | 深圳麦格米特电气股份有限公司 | Magnetron state detection method, device, controller, circuit and system |
| CN113848399A (en) * | 2020-06-28 | 2021-12-28 | 广东威特真空电子制造有限公司 | Microwave oven and magnetron detection device |
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